English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 60695/93562 (65%)
造訪人次 : 1049847      線上人數 : 28
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/120169

    題名: Unraveling the anomalous channel-length-dependent blue energy conversion using engineered alumina nanochannels
    作者: Su, Yen-Shao;Hsu, Shih-Chieh;Peng, Po-Hsien;Yang, Jie-Yu;Gao, Mengyao;Yeh, Li-Hsien
    關鍵詞: Nanofluidics;Nanopore;Osmotic power;Ion transport;Reverse electrodialysis
    日期: 2021-06
    上傳時間: 2021-03-12 12:10:59 (UTC+8)
    摘要: Blue energy conversion, where the chemical energy stored in salinity gradients can be converted into electricity with ion-selective nanochannel membranes, has considered to be one of the most promising renewable energies. Conventional understanding on this energy suggests that as to largely reduce the resistance, ultrashort channel membranes are required to gain high-energy output. To understand the channel-length-dependent blue energy conversion in detail, we engineered a series of highly ordered and uniform ~23.0 nm in diameter alumina nanochannel membranes with various lengths. Most anomalously, our experiments however show that for sufficiently short nanochannels, the shorter the channel length, regardless of surface charge nature, the smaller the generated power, violating the past understanding. The anomalous channel-length-dependent blue energy conversion is well supported by our rigorous model. The modeling reveals that ultrashort nanochannels will induce the significant ion concentration polarization effect, which appreciably undermines effective salinity ratio and ion selectivity in the nanochannel. If this effect dominates, the nanofluidic osmotic power turns into a decrease with decreasing channel length. Both the experimental and theoretical results reported consistently highlight the importance of osmotic ion transport especially in ultrashort nanochannels, and this finding shed light on the design of high-efficiency blue energy harvesters.
    關聯: Nano Energy 84, 105930
    DOI: 10.1016/j.nanoen.2021.105930
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文


    檔案 描述 大小格式瀏覽次數



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋